Electric conductor



Dec. 12, 1933.

E. J. SCHNEIDER EI'AL *ELECTRIC CONDUCTOR Filed 001;. 12, 1928 A ORNEY Patented Dec. 12, 1933 ELECTRIC CONDUCTOR Edwin J. Schneider, Jamaica, and Merritt B.

Bradt, Brooklyn, N. Y., assignors, by mesne assignments, to General Cable Corporation, New York, N. Y., a corporation of New Jersey Application October 12, 1928. Serial No. 311,998 1 Claim. (01. 173-264) This invention relates to electric conductors and particularly to devices of this class employing nonmetallic casings or jackets; and the object of the invention is to provide a conductor 5 of the class described consisting of two electric wires or strands arranged in a. single outer jacket, each wire or strand being first enclosed in a body or casing of rubber, then in a braided casing, two other casings being wound upon the braided casing preferably in opposite directions,

the latter casings consisting of flat and twisted paper strands wound in multiple; a further object being to provide a conductor of the class described including between the separate conductor elements, filler members, one of which is in the form of a ground wire; a still further object being to provide a conductor wherein the inner braided casings of the separate strands and the outer braided casing enclosing the separate strands are treated to render the same waterproof as well as fire and water proof; and with these and other objects in view, the invention consists in a device of the class and for the purpose specified, which is simple in construction, efllcient in use, and which is constructed as hereinafter described and claimed.

The invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the separate parts of our improvement are designated by suitable reference characters, and in which:-

The drawing is a perspective view showing our 4 improved conductor, and indicating the method of arranging the separate casings thereon.

Our improved electric conductor in the construction shown, consists of two wire strands or conductors proper 1, upon each of which is arranged a number of casings, prior to the assemw blage of both conductors in an outer casing or jacket, and the brief description of one conductor will apply to both.

Arranged directly on the conductor 1 is a body of rubber 2 upon which is arranged a braided casing or jacket 3 and wrapped upon the casing or jacket 3 is another casing 4 consisting of fiat paper strips 4a and 4b arranged in parallel relation and spirally wound upon the easing 3 with adjacent edges of said strips abutting. Another casing 5 is wound directly upon the casing 4 and consists, in the construction shown, of a plurality of similarly formed twisted cordlike paper strands 5a which are wound in multiple, a multiple of six being shown in the draw- T'his casing is wound upon the casing 4 spirally in a direction opposite to the winding of the casing 4 as will be apparent.

The two conductors with the casings 3, 4 and 5 thereon are contained within an outer braided casing or jacket 6, and in the crevices formed 00 between the separate conductors within the casing 6 are filler members 7 and 8, one of which may be of cord, twisted paper or the like, and the other is preferably in the form of a wire strand which is utilized as a ground wire in the use of our improved conductor.

In the manufacture of the conductor, it is preferredthat the separate casings or windings are treated with a waterproof compound which has a sumcient quantity of wax to insure against adhesion between the separate parts and this compound will include a fireprooflng elementas applied to the outer casing 6 and the compound on the inner casing 3 may be of a'fireproof type or a combination fire and waterproof type. 15 With the structure herein disclosed, it will be apparent that a strong and durable as well as flexible construction is provided for the conductors 1 in the several casings employed, and one of the distinctive features of the invention resides in providing an inner braided casing 3 arranged directly upon the body of rubber 2, which permits the insertion of the conductor with the body 2 and casing 3 thereon into outlet boxes, fixtures and the like with a greater--35 amount of protection to the conductor, the' braided casing serving as a protector and guard for the rubber body, and in opening up the conductor to separate the separate strandsand in stripping said strands of the casings 4 and 5, this result is facilitated by employing the multiple wrappings and the free and quick release be-' tween the respective casings by virtue of the compound employed.

While we have shown certain specific types of protector casings with a particular arrangement thereof, it will be understood that the in-"' vention is not necessarily limited to this specific structure and various other changes in and modifications of the structure herein set out may be made within the scope of the appended claim without departing from the spirit of our inven-# tion or sacrificing its advantages.

Having fully described our invention, what we claim as new and desire to secure by Letters Patent, is:

An article of manufacture comprising in combination with a metal electric conductor, a body of insulating material surrounding said conductor, a braided protector covering mounted ing being composed of twisted paper cords, and the strips of both of said protector casings being wound in multiple with the edges of said strips casing spirally wound upon said first named casing in a direction opposite to the windings of the first named casing, the second named casin the respectivecasings abutting.

EDWIN J. SCHNEIDER. MERRI'I'I B. BRADT. 

